设f'(x)为连续函数，则等于()． A.A B.B C.C D.D 发布时间：2022-07-07 06:37 │ 来源：www.tikuol.com 题型：单项选择题 问题： 设f'(x)为连续函数，则等于()．A.AB.BC.CD.D
题型：单项选择题 任务型阅读。Dear Mary, I saw your name in the newspaper, you asked for pen-friends in China. I would like to be your pen-friend. I am a thirteen-year-old boy. I live in Nanjing. I am a student at No.1 Secondary School. We study Chinese, English, Maths, Science, Art, PE and some other subjects. My favorite subjects are Maths and PE. I like playing the guitar, collecting stamps and taking photos. I like summer best because my favourite sport is swimming. My family is not big. My grandfather, my father, my mother, and I live a happy life here. My father is an engineer, my mother is a doctor. My grandfather was a policeman and now he is retired (退休). We live in an old house. Near our house, there is a beautiful park. Our family often take a walk in the park after supper. I would like to know something about you and the UK. Please write to me soon. My e-mail address is yuren@163.com. My fax and telephone number is 86-25-82011853. Yu Ren Yu Ren's profileNameYu RenAge 1 Telephone and fax number86-25-82011853 2 of the schoolNo.1Secondary School 3 subjectsMaths and P.E.HobbiesPlaying the guitar , 4 stamps and taking photos Favourite sportI like swimming 5 Favourite season 6 family 7 There are 8 people in the family. Grandfather, father, and mother who works in a 9 . 10 yuren@163.com1._____ 2._____ 3._____ 4._____ 5._____6._____ 7._____ 8._____ 9._____ 10._____ 查看答案
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等于()．
等于()．